Lubricating oil



2,056,354 PATENT OFFICE 2,086,354 LUBRICATING OIL Bert H. Lincoln, Ponca City, Okla., and Alfred Henriksen, deceased, late of Ponca City, Okla.,

by Ellen M. He

nriksen, administratrix, Perry,

kla., assignors, by mesne assignments, to The Lubrl-Zol Development Corporation, Cleveland, Ohio, a corporation of Delaware No Drawing. Application April 12, 1935, Serial No. 15,984

4 Claims.

Our invention relates to lubricating oils and more particularly to lubricating oils having increased film strength.

This application is a continuation in part of 5 our copending application, Serial No. 680,664, in which copending application a lubricating oil having added thereto a small quantity of halogenated aromatic hydrocarbon containing two or more benzene nuclei, and particularly a chlorinated aromatic hydrocarbon selected from the phenyl benzol group, was disclosed.

The most common member oi the phenyl benzol group is diphenyl. While halogenated diphenyl is eflicient in increasing the film strength,

other factors must be considered in obtaining a satisfactory lubricating oil. The most important of these factors is the corrosion factor. The question of sludge formation and the color change occurring in the oil when the addition of the 11211-- ogenated compound is made must be also considered.

Corrosion tests were made in the following manner. Metals were placed in a container with the oil containing the halogenated compound at a temperature of 290 F., and allowed to remain for forty-eight hours, while moist air was being passed through the oil. The loss or gain in weight of the various metals tested shows comparatively the corrosion which would occur in use. The

sludge formed indicates the sludging which would take place in use and changes or color can be observed.

Diphenyl benzene was chlorinated to form the mono-chlor product. A blend of one percent of the chlorinated diphenyl benzene was prepared with hydrocarbon oil viscosity 8. A. E. 30. The above tests were then run with the blend of hydrocarbon oil and chlorinated dinhenyl benzene upon lead-bronze alloy. The corrosion loss was only one milligram per hundred square centimeters. There was no sludge and the color of the oil measured on the true color scale was 414. The original hydrocarbon oil without any addition product, after being subjected to the same test,

had a color of 530 measured-on the true color scale. It will be observed that chlorinated diphenyl benzene has a stabilizing efl'ect on the oil as the original oil was darker after the test than the blended oil. i The same test, using chlorinated diphenyl benzene was run. on copper which gave a corrosion loss of two and two tenths milligrams per hundred square centimeters. There was no sludge and the color of the oil was 517, measured on the true colorscale.

The same test, using chlorinated diphenyl benzene, was run on bronze. The corrosion loss was only one and eight tenths milligrams per hundred square centimeters and the color of the oil was 461. r

The original hydrocarbon oil, without any addition product, gave a corrosion loss of five tenths milligrams per hundred square centimeters on a lead-bronze alloy, three milligrams per hundred square centimeters on copper, and two milligrams per hundred square centimeters on bronze.

The addition of one percent of chlorinated diphenyi benzene to the original hydrocarbon oil three benzene nuclei did not have quite as high a film strength as those chlorinated aromatic compounds having only two benzene nuclei. The film strength improvement, however,. is greatly increased over the original hydrocarbon oil.

The amount of chlorinated product to be added to the hydrocarbon oil varies within wide limits, one percent giving a remarkable improvement. As much as forty percent may be added, depending upon the nature of the originalhydrocarbon oil being used.

The degree of chlorination may be also varied over wide limits. The mono-chlor product gives a lower film strength than does the dichlor product.

In use, we prefer to add from one tenth of one percent to ten percent or more by volume of the chlorinated product to the hydrocarbon oil.

Having thus described our invention, what we claim i 1. -A lubricating oil comprising in combination a major proportion of hydrocarbon oil and a minor proportion of chlorinated dlphenyl benzol.

2. A lubricating oil comprising in combination a hydrocarbon oil and a small amount of chlorinated diphenyl benzol.

3. A lubricating oil comprising in combination a major proportion of a hydrocarbon oil and a minor proportion of a substituted, chlorinated dlphenyl benzo'l.

4. A lubricating oil comprising in combination a hydrocarbon oil and a small amount of a substituted, chlorinated diphenvl benzol.

BERT H. LINCOLN. ELLEN M. HENRIKSEN, Administratria: for the Estate of Alfred Henriksen,

Deceased. 

